Question

irrigation machinery has ________ the amount of irrigated land in the us.
a. doubled
b. tripled
c. quadrupled
d. quintupled

please select the best answer from the choices provided.

Explanation:

Analyze the impact of irrigation machinery

The introduction and widespread adoption of modern irrigation machinery (such as center-pivot systems) during the 20th century significantly expanded the capacity to water crops in regions with limited rainfall, particularly in the Great Plains and Western United States.

Determine the historical growth factor

Historical agricultural data from the United States Department of Agriculture (USDA) indicates that the total acreage of irrigated cropland in the US grew from approximately 7-8 million acres in the early 1900s to over 40 million acres by the late 20th century. This represents a growth factor of more than five times, which corresponds to "quintupled".

Answer:

• A. doubled
• B. tripled
• C. quadrupled
• D. quintupled (Correct answer)